Harsanyi often works from home, so the pair end up spending a lot of time together.
"Ruben likes to sleep by — or, preferably, on — my feet," Harsanyi explained.
When Harsanyi disturbs Ruben's nap time by getting up and moving around, Ruben decides he might as well get up and move around, too.
"When I go upstairs he tends to camp out on the landing so he can monitor what’s going throughout the house," Harsanyi said.
Often Ruben falls fast asleep right there at the bottom of a set of the steps. This means that when Harsanyi when Harsanyi turns the corner to go back downstairs, he's met with what — on first glance — looks like a harrowing spectacle.